ASTM A203 Grade A is a kind of Ni-alloy steel material used to fabric high temperature pressure vessels. ASTM A203 Grade A this property is based on it's Ni composition. A533 Grade B Mn-Mo and Mn-Mo-Ni alloy steel plates

ASTM A106 pipe is the standard specification for seamless carbon steel pipe for high-temperature service. Most common uses are in refineries and plants when gasses or fluids are transported at high temperatures and pressures.